Form for concrete girder construction.



H. E-RICSSON.

FORM FOR CONCRETE GIRDER CONSTRUCTION.

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APPLI CATION FILED .HJLY 18, 1910.

Patented Aug. 31, 1915.

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smarts rarnn r @Fltlflt HENRY ERIQSSON, 0F CHIGAGOQILLINOIS.

FORM FOR CONCRETE GIRDER CONQTRUCTION.

' 1 Specification of Letters Patent.

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Application filed July 18, 1910. Serial No. 572,428. 7

To all whom it may concern Be itknown that I, HENRY ERrossoN, a citizen of the UnitedzStates, residing at Chi-r cago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements 1n Forms for Concrete ,C rirder Construction, of which the following is a description. I

My invention relates to means for forming a girder or similar parts in building constructionand providing for the proper support of the joist or other adjacentportions of the structure during the forming and hardening or setting of the girder.

The object of my invention is to provide a simple, convenient, cheap and durable device of the kind described which is sui'liciently portable and adjustable to be employed repeatedly in constructions of the same general class or character.

To this end my invention consists in thenovel construction, arrangement and I combination of parts herein shown and described and more claims. 7

In the accompanying drawings wherein like or similar reference characters indicate like or corresponding parts: Figure 1 is a vertical transverse section of my device. Fig. 2 is an enlarged detall showing the construction and arrangement of the sideof the mold and associated parts.

In the preferred form'shown, a suitable bed piece 1 is provided arranged to rest upon the floor or other portion of the structure bein constructed for supporting the forms and means is providedarranged to rest upon the bed piece. As shown the form support ing means consists of a pair of timbers 22 of suitable length connected near their lower ends by a tie 3 rigidly attached to each and at their upper ends by a cross barfl also rigidly secured to the timbers 22 with both ends projecting beyond the timbers. A pair of braces 55 or equivalent means are rigidly secured tov the timbers 2 2 near the cross tie 3 and each extends upward and laterally to the upper end of the opposite timber where they are securely attached to the timbersand'to the cross bar 4 A portion near the end of each brace preferably'pro, jects above the cross bar 4 with the inner face or edge of the brace formed and positioned substantially at right-angles to the bar. Suitable adjusting means are prowidth with the columns 9 for particularly pointed out in the an up-right or form supporting My improved form for molding the girder is arranged to rest upon the cross bar l and preferably consists of a bottom part 8 adapt- 1 ed to form the bottom face of the girder corresponds accurately in supporting the girder. The sides of the mold are each composed of an l. shaped part preferably formed of two planks l0 and 11 positioned which preferably Y at substantially right angles with each other to form an i... The plank 1O rests upon the cross bar 1 and is substantially parallel to the common plane of the cross bars 41 and in the same plane as the bottom part 8 of the mold. A transversely curved plate or side member 12 is provided, resting upon and rigidly secured to the free edges of the L shaped part 10-]1 adapted to serve as a side member for the mold and to control the form of this portion of the girder. In assembling themold the supporting means are arranged in position and the bottom part 8 is fitted into the spaces between the columns.

The L. shaped side parts 10-11 are next placed in position at each side of the bottom part 8 and the curved side member 12 is rigidly secured to the free edges of the parts 10 and 11. A wedge 14; or other adjustingand locking means is next inserted and forced into the space between the pro ecting part of each brace 5 and plank 11 thereby clamping the bottom part 8 between the side members 12 and providing a satisfactorily tight joint between the bottom part 8, the sides of the column 9 and the parts 12. The parts 12 are each preferably-continuous for any desired length of girder. W'h'en thus constructed it is obvious that suitable ceiling or'floor forms may be mounted upon the upper edge of the parts 11 for constructing a concrete floor 'or ceiling, or if desired, suitable joist or other supporting timbers may rest upon this portion of the mold while the girder isbeing constructed and whilethe concrete forming the girder is setting or hardening, after which the wedges 14: and 6 may beremoved permitting the supportingmeans and the girder form to be taken down and moved into some other position.

Y I. It is obvious that the several parts of mV similar structures. I i fiavlng thusdescribed. my

it is obvious that various immaterial modifications may be made in my device wlthout hence I do not wish to'be understood as vmeans comprising two curved, sheet metal limiting myself to the exact'form or construction shown. s

What I claim as new and desireto secure by 1 Letters Patent is Y 1. A device of the kind described, comside members each ,extendin'g upward and outward, said supporting means having two flat faces at an angle to each other extending longitudinally of and engaging the edges of 1 said side members, a bottom part positioned between said side parts, and means for sup- 7 "2. A' device upper end of said supporting means, and A porting said'side members and forcing the same against said bottom part and locking the parts in position,

prising supporting means, a crossbar atthe means rigidly engaging saidcross bar near its ends with a partprojecting upward at substantiallyright angles to said bar, in com-o bination with a form resting'upon saidcross bar/comprising two curved side members each said side parts, and means for engagmgthe extending upward and outward from said cross bar, a bottom part positioned between edges only of said side part supporting and forcing the same against said bottompart V andlocking the parts in position.

3. A device ofthe kind described, comprising supporting means, in combination with a form resting upon said supporting means comprising two transversely curved members extending upward and outward from said supporting means, a bottom part positioned between said side parts and means engaging the-lower margin of each of said side parts to-support the same and force them against said bottom part, means for supporting the upper edges of, saidcurved members and'means for locking the parts in position. t

4:. A device of the kind described, comprising a plurality of supporting'means and a cross bar at the upper end of each of said supporting means, in combination with a 1 form resting upon saldcross bar compriss ing two L shaped parts, each having one side parallel to the common plane ofsaid I cross bars and a side part resting upon the improvement of the described, com

free edges of said L shaped part and extending upward and outward from said cross bar, a bottom part positioned between said side parts and means for forcing said side parts against said bottom part and locking the parts in position.

5. A device of the kind described, comprising supporting means, in combination with a form comprising two sheet metal side members each extending upward and outward with the plane of the longitudinal departing from the splrit of my-invention,

margins of each sidemelnber at substantially rightangles to each other, said supporting means having two flat faces at an v angle to each other extending longitudinally of and engaging the edges of said side memhere, a body part positioned between said members and arranged to support a plurality of ceiling forms in position, a bottom part positioned between said side parts, and means for forcing said side members into position against said body part.

'7. A device of the kind described, comprising supporting means, in combination with a form resting upon said supporting means comprising two transversely curved side members each extending upward and outward in the form of a quadrant from said supporting means with an L-shaped part engaging the edges only of said side member arranged to support a plurality of ceiling forms in position, a bottom part corresponding in width to the width of the column for supporting the girder, positioned between said side parts and means for supporting said side parts and forcing them against said bottom part and the sides of said column, whereby said side members cooperate jointly with said bottom part and the side of said column to form a mold for said girder.

8. A device of thekind described, comprising a plurality of supporting means and a cross bar at the upper end of each of said supporting means, in combination with a form resting upon said cross bar comprising two L shaped parts each with one side positioned parallel to the common plane of said cross bars and aside part resting upon the free edges of said L shaped parts and extending upward and outward from said cross bar, a bottom part corresponding in width to the column for supporting the girder positioned between said side parts and means cooperating with said braces for forcing said sidepart against said bottom part and the sides of said column and locking said parts in position, Where said side members cooperate jointly with said bot tom part and the side of said column to form a mold for said girder.

9. A device of the kind described, com prising a plurality of supporting means, a cross bar at the upper end of each of said supporting means and braces engaging said cross bar near its ends with a part projecting at substantially right angles to the bar, in combination with a form resting upon said cross bar comprising two L shaped parts each positioned with one side parallel to the common plane of said cross bars and a transversely curved side part resting upon the free edges of said L shaped part extending upward and outward from said cross bar arranged to support a plurality of ceiling forms in position, a bottom part positioned between said side parts and means cooperating with said braces for forcing said side parts against said bottom part and locking the parts in position.

10. In a device of the kind described, a form comprising a cross bar, two curved side members extending upward and outward from said cross bar, said supporting means having two flat faces at an angle to each other extending longitudinally of and engaging the edges of said side members, a bottom part positioned between said side parts, and means cooperating with said cross bar for forcing said side parts against said bottom part and locking the parts in position.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

HENRY ERIGSSON.

l/Vitnesses:

BURTON U. HILLS, BLANOHE CHALMERS.

Copies of this patent may be obtained for five cents each, by addressing the C'ommissioner of Patents,

Washington, D. G. 

